Yes like a "Anti ibn saba" movement lol
Interestingly countering the ummayyad lobby would be easy in Iraq Yemen and Hijaz
Persia was iffy anyway most of it nonmuslim at that time
Supporters of ALi in Iraq and Medina are pissed but they can be won over if the Khawarij highlite their anti-ummayyad and pro-Iraqi agenda I think ( few might still resent the khawarij) and downplay their personal hostility towards ALi , afterall the assassin of ALi might be killed as well.
Egypt after killing of AMr b a'as in our timeline is open , Amr leaves no clear successor and no one tribe is dominant there
If mauwiayh is killed so soon, then Abdur rehman b Khalid b walid is the most obvious successor and he is a formidable enemy.
I can see Shaam breaking away from the rest of the caliphate.Abdur rehman might be even more popular than muawiayh amongst the Syrians plus used to the luxurious byzantine lifestyle the Syrians might not welcome the strict austere lifestyle of tribals from Iraq/hijaz/yemen where khawarij drew their main supporters.
I don't think the Shurha can ever be friends with the Shia, too much doctrinal difference. Iraq vs Sham isn't enough to sway the two to be allies I'm afraid in the long run. For one thing the Shurha to this day retain the belief that Ali and Muawiyah were Kufr or at least Taghoot.